27
4 Mounting
VEGASOURCE 82 • Source holder
66076-EN-220119
1
2
3
Fig. 20: Putting on the protective cap
1 Put on protective cap
2 Turn the straps of the protective cap under the fastening screws
2 Tighten fixing screws
The switching status of the source holder can also be seen when the
protective cap is in place.
Due to the special design, the lid can only be put on in such a way
that the visible indication plate on the source holder shows the current
switching status.
Measurement of the local dose rate
After mounting, i.e. as soon as the radioactive emitter is mounted in
the source holder, the local dose rate in the area of the source holder
and the detector must be measured in µSv/h.
Caution:
Depending on the respective installation, radiation can also leak out
of the beam exit channel due to scattering. Such stray radiation must
be shielded off with additional lead or steel sheets. All control and off-
limit areas must be rendered inaccessible and provided with warning
signs.
Behaviour with empty vessel
Caution:
After technically correct mounting, the control area around an empty
vessel must be measured for radioactivity and if there is any, the area
must be cordoned off and marked. Possible ways of access to the
inside of the vessel must be reliably closed off and marked with a
warning sign "Radioactive".
The responsible radiation safety officer can allow access after having
checked the safety measures with switched-off source holder.
If work must be carried out in and on the vessel, it is absolutely neces-
sary to switch off the radiation on the source holder.
Installation control
